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| <div class="subTitle">org.apache.ignite.events</div> |
| <h2 title="Class DiscoveryEvent" class="title">Class DiscoveryEvent</h2> |
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| <li> |
| <ul class="inheritance"> |
| <li>org.apache.ignite.events.DiscoveryEvent</li> |
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| <br> |
| <pre>public class <span class="strong">DiscoveryEvent</span> |
| extends <a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></pre> |
| <div class="block">Grid discovery event. |
| <p> |
| Grid events are used for notification about what happens within the grid. Note that by |
| design Ignite keeps all events generated on the local node locally and it provides |
| APIs for performing a distributed queries across multiple nodes: |
| <ul> |
| <li> |
| <a href="../../../../org/apache/ignite/IgniteEvents.html#remoteQuery(org.apache.ignite.lang.IgnitePredicate, long, int...)"><code>IgniteEvents.remoteQuery(org.apache.ignite.lang.IgnitePredicate, long, int...)</code></a> - |
| asynchronously querying events occurred on the nodes specified, including remote nodes. |
| </li> |
| <li> |
| <a href="../../../../org/apache/ignite/IgniteEvents.html#localQuery(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.localQuery(org.apache.ignite.lang.IgnitePredicate, int...)</code></a> - |
| querying only local events stored on this local node. |
| </li> |
| <li> |
| <a href="../../../../org/apache/ignite/IgniteEvents.html#localListen(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.localListen(org.apache.ignite.lang.IgnitePredicate, int...)</code></a> - |
| listening to local grid events (events from remote nodes not included). |
| </li> |
| </ul> |
| User can also wait for events using method <a href="../../../../org/apache/ignite/IgniteEvents.html#waitForLocal(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.waitForLocal(org.apache.ignite.lang.IgnitePredicate, int...)</code></a>. |
| <h1 class="header">Events and Performance</h1> |
| Note that by default all events in Ignite are enabled and therefore generated and stored |
| by whatever event storage SPI is configured. Ignite can and often does generate thousands events per seconds |
| under the load and therefore it creates a significant additional load on the system. If these events are |
| not needed by the application this load is unnecessary and leads to significant performance degradation. |
| <p> |
| It is <b>highly recommended</b> to enable only those events that your application logic requires |
| by using <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getIncludeEventTypes()"><code>IgniteConfiguration.getIncludeEventTypes()</code></a> method in Ignite configuration. Note that certain |
| events are required for Ignite's internal operations and such events will still be generated but not stored by |
| event storage SPI if they are disabled in Ignite configuration.</div> |
| <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/apache/ignite/events/EventType.html#EVT_NODE_METRICS_UPDATED"><code>EventType.EVT_NODE_METRICS_UPDATED</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVT_NODE_FAILED"><code>EventType.EVT_NODE_FAILED</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVT_NODE_JOINED"><code>EventType.EVT_NODE_JOINED</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVT_NODE_LEFT"><code>EventType.EVT_NODE_LEFT</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVT_NODE_SEGMENTED"><code>EventType.EVT_NODE_SEGMENTED</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVTS_DISCOVERY_ALL"><code>EventType.EVTS_DISCOVERY_ALL</code></a>, |
| <a href="../../../../org/apache/ignite/events/EventType.html#EVTS_DISCOVERY"><code>EventType.EVTS_DISCOVERY</code></a>, |
| <a href="../../../../serialized-form.html#org.apache.ignite.events.DiscoveryEvent">Serialized Form</a></dd></dl> |
| </li> |
| </ul> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
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| <td class="colOne"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#DiscoveryEvent()">DiscoveryEvent</a></strong>()</code> |
| <div class="block">No-arg constructor.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#DiscoveryEvent(org.apache.ignite.cluster.ClusterNode, java.lang.String, int, org.apache.ignite.cluster.ClusterNode)">DiscoveryEvent</a></strong>(<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> node, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> msg, |
| int type, |
| <a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> evtNode)</code> |
| <div class="block">Creates new discovery event with given parameters.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#eventNode()">eventNode</a></strong>()</code> |
| <div class="block">Gets node that caused this event to be generated.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#eventNode(org.apache.ignite.cluster.ClusterNode)">eventNode</a></strong>(<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> evtNode)</code> |
| <div class="block">Sets node this event is referring to.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#shortDisplay()">shortDisplay</a></strong>()</code> |
| <div class="block">Gets a shortened version of <code>toString()</code> result.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#topologyNodes()">topologyNodes</a></strong>()</code> |
| <div class="block">Gets topology nodes from topology snapshot.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#topologySnapshot(long, java.util.Collection)">topologySnapshot</a></strong>(long topVer, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> topSnapshot)</code> |
| <div class="block">Sets the topology snapshot.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#topologyVersion()">topologyVersion</a></strong>()</code> |
| <div class="block">Gets topology version if this event is raised on |
| topology change and configured discovery SPI implementation |
| supports topology versioning.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/DiscoveryEvent.html#toString()">toString</a></strong>()</code></td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| <h3>Methods inherited from class org.apache.ignite.events.<a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></h3> |
| <code><a href="../../../../org/apache/ignite/events/EventAdapter.html#compareTo(org.apache.ignite.events.Event)">compareTo</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#equals(java.lang.Object)">equals</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#hashCode()">hashCode</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#id()">id</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#localOrder()">localOrder</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#message()">message</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#message(java.lang.String)">message</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#name()">name</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#node()">node</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#node(org.apache.ignite.cluster.ClusterNode)">node</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#timestamp()">timestamp</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#type()">type</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#type(int)">type</a></code></li> |
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| <h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <ul class="blockList"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="DiscoveryEvent()"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>DiscoveryEvent</h4> |
| <pre>public DiscoveryEvent()</pre> |
| <div class="block">No-arg constructor.</div> |
| </li> |
| </ul> |
| <a name="DiscoveryEvent(org.apache.ignite.cluster.ClusterNode, java.lang.String, int, org.apache.ignite.cluster.ClusterNode)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
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| <h4>DiscoveryEvent</h4> |
| <pre>public DiscoveryEvent(<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> node, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> msg, |
| int type, |
| <a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> evtNode)</pre> |
| <div class="block">Creates new discovery event with given parameters.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>node</code> - Local node.</dd><dd><code>msg</code> - Optional event message.</dd><dd><code>type</code> - Event type.</dd><dd><code>evtNode</code> - Node that caused this event to be generated.</dd></dl> |
| </li> |
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| <h4>shortDisplay</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> shortDisplay()</pre> |
| <div class="block">Gets a shortened version of <code>toString()</code> result. Suitable for humans to read.</div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../org/apache/ignite/events/Event.html#shortDisplay()">shortDisplay</a></code> in interface <code><a href="../../../../org/apache/ignite/events/Event.html" title="interface in org.apache.ignite.events">Event</a></code></dd> |
| <dt><strong>Overrides:</strong></dt> |
| <dd><code><a href="../../../../org/apache/ignite/events/EventAdapter.html#shortDisplay()">shortDisplay</a></code> in class <code><a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></code></dd> |
| <dt><span class="strong">Returns:</span></dt><dd>Shortened version of <code>toString()</code> result.</dd></dl> |
| </li> |
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| <a name="eventNode(org.apache.ignite.cluster.ClusterNode)"> |
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| <h4>eventNode</h4> |
| <pre>public void eventNode(<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> evtNode)</pre> |
| <div class="block">Sets node this event is referring to.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>evtNode</code> - Event node.</dd></dl> |
| </li> |
| </ul> |
| <a name="eventNode()"> |
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| <pre>public <a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a> eventNode()</pre> |
| <div class="block">Gets node that caused this event to be generated. It is potentially different from the node |
| on which this event was recorded. For example, node <code>A</code> locally recorded the event that a remote node |
| <code>B</code> joined the topology. In this case this method will return ID of <code>B</code>.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Event node ID.</dd></dl> |
| </li> |
| </ul> |
| <a name="topologyVersion()"> |
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| <h4>topologyVersion</h4> |
| <pre>public long topologyVersion()</pre> |
| <div class="block">Gets topology version if this event is raised on |
| topology change and configured discovery SPI implementation |
| supports topology versioning.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Topology version or <code>0</code> if configured discovery SPI implementation |
| does not support versioning.</dd></dl> |
| </li> |
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| <a name="topologyNodes()"> |
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| <h4>topologyNodes</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> topologyNodes()</pre> |
| <div class="block">Gets topology nodes from topology snapshot. If SPI implementation does not support |
| versioning, the best effort snapshot will be captured.</div> |
| <dl><dt><span class="strong">Returns:</span></dt><dd>Topology snapshot.</dd></dl> |
| </li> |
| </ul> |
| <a name="topologySnapshot(long, java.util.Collection)"> |
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| <h4>topologySnapshot</h4> |
| <pre>public void topologySnapshot(long topVer, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><span class='angle_bracket'><</span><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a><span class='angle_bracket'>></span> topSnapshot)</pre> |
| <div class="block">Sets the topology snapshot.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>topVer</code> - Topology version.</dd><dd><code>topSnapshot</code> - Topology snapshot.</dd></dl> |
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| <h4>toString</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> toString()</pre> |
| <dl> |
| <dt><strong>Overrides:</strong></dt> |
| <dd><code><a href="../../../../org/apache/ignite/events/EventAdapter.html#toString()">toString</a></code> in class <code><a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></code></dd> |
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| <div class="aboutLanguage"><em>Apache Ignite - In-Memory Data Fabric</em></div> |
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| <p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://incubator.apache.org/projects/ignite.html"><nobr>2015 Copyright © Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Apache Ignite Fabric</b> </td> <td>: ver. <strong>1.0.0-RC3</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: March 24 2015 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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